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  <title>使用私钥解密数据</title>
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  <div id="layout-content"><div id="function.openssl-private-decrypt" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">openssl_private_decrypt</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.6, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">openssl_private_decrypt</span> &mdash; <span class="dc-title"> 使用私钥解密数据 </span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.openssl-private-decrypt-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>openssl_private_decrypt</strong></span>(<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$decrypted</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter">$key</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">int</span> <code class="parameter">$padding</code><span class="initializer"> = OPENSSL_PKCS1_PADDING</span></span><br>): <span class="type">bool</span></div>

  <div class="caution"><strong class="caution">警告</strong>
 <p class="para">
  本函数并不会生成安全加密的值，并且<em class="emphasis">不可</em>用于加密或者要求返回值不可猜测的目的。
 </p>
 <p class="para">
  如果需要加密安全随机，则可以将 <span class="classname"><a href="class.random-engine-secure.html" class="classname">Random\Engine\Secure</a></span> 引擎用于
  <span class="classname"><a href="class.random-randomizer.html" class="classname">Random\Randomizer</a></span>。对于简单的用例，<span class="function"><a href="function.random-int.html" class="function">random_int()</a></span>
  和 <span class="function"><a href="function.random-bytes.html" class="function">random_bytes()</a></span> 函数提供了操作系统的 <abbr title="Cryptographically Secure PseudoRandom Number Generator">CSPRNG</abbr> 支持的方便且安全的 <abbr title="Application Programming Interface">API</abbr>。
 </p>
</div>
  <p class="para">
   <span class="function"><strong>openssl_private_decrypt()</strong></span> 解密先前通过 <span class="function"><a href="function.openssl-public-encrypt.html" class="function">openssl_public_encrypt()</a></span> 函数加密的
   <code class="parameter">data</code> 并将结果保存至<code class="parameter">decrypted</code>变量中。 
  </p>
  <p class="para">
   你可以用该函数来解密只对你可用的数据。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.openssl-private-decrypt-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">data</code></dt>

     <dd>

      <p class="para">
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">decrypted</code></dt>

     <dd>

      <p class="para">
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">key</code></dt>

     <dd>

      <p class="para">
       <code class="parameter">key</code> 必须是和用来加密数据所用公钥对应的私钥。
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">padding</code></dt>

     <dd>

      <p class="para">
       <code class="parameter">padding</code> 可以是如下值：
       <strong><code>OPENSSL_PKCS1_PADDING</code></strong>,
       <strong><code>OPENSSL_SSLV23_PADDING</code></strong>,
       <strong><code>OPENSSL_PKCS1_OAEP_PADDING</code></strong>,
       <strong><code>OPENSSL_NO_PADDING</code></strong>.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.openssl-private-decrypt-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.openssl-private-decrypt-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.openssl-public-encrypt.html" class="function" rel="rdfs-seeAlso">openssl_public_encrypt()</a> - 使用公钥加密数据</span></li>
    <li class="member"><span class="function"><a href="function.openssl-public-decrypt.html" class="function" rel="rdfs-seeAlso">openssl_public_decrypt()</a> - 使用公钥解密数据</span></li>
   </ul>
  </p>
 </div>


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